Grinding and amalgamating pan



(No Model.) 2 Sheets-Sheet 1.

' I. LEPLEY & W.:H. HEPBURN.

GRINDING AND AMALGAMATING PAN. No. 250,552. Patented Dec. 6,1881.

fizz/( 01% qum/ I (No Model.) 2 Sheets-Sheet 2.

I. LEPLEY & W. H. HEPBURN.

GRINDING AND AMALGAMATING PAN.

No. 250,552. I Patented Dec. 6,1881.

UNITED STATES PATENT l EEicE.

ISAAC LEPLEY AND WILLIAM H. HEPBURN, OF AMADOR, CALIFORNIA.

GRINDING AND AMALGAMATING PAN.

SPECIFICATION forming part of Letters Patent No. 250,552, dated December6, 1881 Application filed August 18, 1881. (No model.)

- To all whom it may concern Be it known that we, ISAAC LEPLEY andWILLIAM H. HEPBURN, of Amador, county of Amador, State of California,have invented a Grinding and Amalgamating Pan and we do hereby declarethe following to be a full, clear, and exact description of the same.

Our invention relates to certain improvements in grinding andamalgamating pans; and it consists in an apparatus for imparting apeculiar motion to the muller by causing the upper end of the shaft todescribe a small circle, in addition to its rotation upon its axis, sothat the muller will he revolved, and will also be caused to have arolling motion upon the bottom or dies, as will be more fully explainedby reference to the accompanying drawings, in which Figure 1 is a viewof the pan in vertical section. Fig. 2 is a plan view. Fig. 3 is anenlarged vertical section of the device for giving a rolling motion.Fig. 4 is a transverse section of the device. Fig. 5 is a detailhorizontal section through the line at a: of Fig.1.

Ais apan of any convenient or suitable form for the work to be done, andhaving dies B in the bottom, in the usual manner.

0 is the muller, having shoes D, which serve to grind the material as itpasses between them and the dies. The muller is driven by a verticalshaft, E, and has the usual hand-wheel and screw to raise and lowerit. Abevel-gear, F, and a pinion, G, upon the horizontal driving-shaft H,give motion to it.

The gear F is secured to a short supplemental spindle, I, which turns ina step, J, and has a peculiarly-slotted opening in its upper end toreceive the foot of the vertical shaft E, which is corrugated or groovedto fit this slot and form a universal clutch-joint, so that while itwill be rotated by the action of the gears upon the step the upper endof the shaft may also be allowed a rolling movement, like that in ahall-and-socket joint. This joint or clutch is shown at E. In order toproduce this movement of the upper part of the shaft a case, K, isformed in the upper part of the central cone of the pan, and rollers L Mare placed vertically within this case, so as to inclose the shaft Ebetween them. The ends of these rollers have pintles, which arejournaled in guiding-plates, and the rollers just fill the space betweenthe sides of the case and the vertical shaft, so that as the latterrotates theyroll around between it and the case. Two

of these rollers, L L, are larger than the rollers M, and they thusforce the shaft E out of a central line, and as it rotates it will thusbe caused to describe a circle with its upper end.

As the muller is carried by the upper end of the shaft E it will alsopartake of this motion, and the result will he that the shoes upon oneside will touch the dies or rim close to them, while those upon theother side will be lifted away from the dies. The outer edge of themuller will thus be given a rolliu g motion around upon ,the dies, sothat the shoes are brought alternately into contact with the dies, whilethe muller is all the time revolving upon its own axis. This peculiaraction tends to bring the pulp beneath every part of the muller, and tosubject it'to a thorough action. The same motion maybe imparted to themuller in various other ways, as by the use of an cecentric sleeveinstead of the rollers,orby other means, the object being to prevent themuller and dies wearing to a perfect fit, as occurs when the muller hasonly a plain horizontal motion.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is

1. The improvement in grinding and amalgamating pans, consisting of therotating muller, with its driving-shaft and gears, as shown, incombination with a mechanism consisting of case K and rolls L M, ofdifferent sizes, whereby an additional rolling or eccentric motion isgiven the muller, substantially as and for the purpose herein described.

2. The muller-driving shaft E and the gear and pinion F and G, incombination with the supplemental spindle I, the step J, the shaft E,and the universal joint or clutch E, substantally as and for thepurposeherein described.

3. Inagrinding and amalgamating pan, the muller O, driving-shaft E, andgears F G, in combination with the step J, spindle I, and universaljoint or clutch E, and the mechanism consisting of case Kand rolls L M,of different sizes, for producing a rolling or eccentric motion,substantially as and for the purpose herein described.

In witness whereof we have hereunto set our hands.

ISAAC LEPLEY. WILLIAM H. HEPBURN. Witnesses:

I. N. RANDOLPH, WARREN PARSONS.

